Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012 Optimize a model with 123 rows, 53 columns and 246 nonzeros Presolve removed 38 rows and 7 columns Presolve time: 0.00s Presolved: 85 rows, 46 columns, 185 nonzeros Variable types: 0 continuous, 46 integer (46 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 2.400000e+01, 51 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 24.00000 0 34 21.00000 24.00000 14.3% - 0s H 0 0 22.0000000 24.00000 9.09% - 0s 0 0 23.00000 0 30 22.00000 23.00000 4.55% - 0s 0 0 23.00000 0 32 22.00000 23.00000 4.55% - 0s * 0 0 0 23.0000000 23.00000 0.0% - 0s Cutting planes: Gomory: 2 Zero half: 5 Explored 0 nodes (107 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%